Asthma is a chronic lung disease that narrows the tubes that help carry air both in and out of the lungs, i.e., the airways. Asthma causes the inside walls of your airways to become swollen and sore, making it hard for the air to pass out of the lungs. As a result of this, there are recurring periods of wheezing, coughing, shortness of breath, and tightness in chest, especially during the night...
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